Determination method of air conditioning outdoor design parameters based on non-guarantee rate of air state

Air conditioning outdoor design parameters are the basic parameters in the design process of air conditioning system, such as load calculation and equipment selection. Values of outdoor air design conditions directly impact on the system design and operation effect. Analyses the current methods for determination of outdoor air design conditions, considers that the coincidence between meteorological parameters is neglected to some extent. Establishes a joint distribution function of dry bulb and wet bulb temperature for typical cities from five climate divisions of China, proposes a method for determination of outdoor air design conditions based on non-guarantee rate of air state. The results show that, compared with the current method, all values of outdoor air design conditions decrease in five cities.